/u/spacecadet6966's posts in /r/askscience

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Why are people’s palms never dark?

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I read recently that Earth's oxygen levels are dropping. What does that mean for humans? How will we continue to breathe when the present air mixture is what makes breathable air?

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Why aren't satellites and probes that are decommissioned/out of use not dumped into the sun? Is it possible/not possible to do the same for all space debris that's littered around the earth? Why or why not? (Sorry if I got the flair wrong)

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How much of a person’s personality is dictated by nature and how much is dictated by nurture? If it’s inherent to a person, how much of the bad can you “train” out? And how effective would it be?

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Why does usually transparent mucus in the body (nose and throat) turn dark when you catch a cold?

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Why is ADHD never considered as a problem in adults? If someone goes undiagnosed as a kid with ADHD, does it stop after they become adults?

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Can differentiated/somatic cells be reversed back into stem cells?

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Why doesn’t immunity to diseases gained through vaccinations not pass down genetically?

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How are headaches different from migraines?

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Sometimes, when your teeth hurt or are feeling particularly sensitive, you feel like gnawing/chewing on something. Why?

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
Why are people’s palms never dark?	9186
I read recently that Earth's oxygen levels are dropping. What does that mean for humans? How will we continue to breathe when the present air mixture is what makes breathable air?	1
Why aren't satellites and probes that are decommissioned/out of use not dumped into the sun? Is it possible/not possible to do the same for all space debris that's littered around the earth? Why or why not? (Sorry if I got the flair wrong)	1
How much of a person’s personality is dictated by nature and how much is dictated by nurture? If it’s inherent to a person, how much of the bad can you “train” out? And how effective would it be?	1
Why does usually transparent mucus in the body (nose and throat) turn dark when you catch a cold?	1
Why is ADHD never considered as a problem in adults? If someone goes undiagnosed as a kid with ADHD, does it stop after they become adults?	1
Can differentiated/somatic cells be reversed back into stem cells?	1
Why doesn’t immunity to diseases gained through vaccinations not pass down genetically?	1
How are headaches different from migraines?	1
Sometimes, when your teeth hurt or are feeling particularly sensitive, you feel like gnawing/chewing on something. Why?	1